diff --git a/iommi/admin.py b/iommi/admin.py
index 3acbbcdc..a1f1b951 100644
--- a/iommi/admin.py
+++ b/iommi/admin.py
@@ -481,8 +481,10 @@ def on_save(request, form, instance, **_):
             )
             messages.add_message(request, messages.INFO, message, fail_silently=True)
 
-        def on_delete(request, form, instance, **_):
-            message = f'{form.model._meta.verbose_name.capitalize()} {instance} was deleted'
+        def delete(request, form, instance, **_):
+            str_instance = str(instance)
+            instance.delete()
+            message = f'{form.model._meta.verbose_name.capitalize()} {str_instance} was deleted'
             messages.add_message(request, messages.INFO, message, fail_silently=True)
 
         form = setdefaults_path(
@@ -491,7 +493,7 @@ def on_delete(request, form, instance, **_):
             call_target__cls=cls.get_meta().form_class,
             call_target__attribute=operation,
             extra__on_save=on_save,
-            extra__on_delete=on_delete,
+            extra__delete=delete,
             actions__submit__include=lambda request, form, **_: cls.has_permission(
                 request, instance=None, model=form.model, operation=operation
             ),
diff --git a/iommi/form.py b/iommi/form.py
index e133687b..6581fd6b 100644
--- a/iommi/form.py
+++ b/iommi/form.py
@@ -1551,10 +1551,10 @@ def create_or_edit_object_redirect(is_create, redirect_to, redirect, form):
 
 def delete_object__post_handler(form, **_):
     instance = form.instance
-    form.invoke_callback(form.extra.on_delete)
+    form.invoke_callback(form.extra.pre_delete)
     if instance.pk is not None:  # Check if already deleted by the callback
         try:
-            instance.delete()
+            form.invoke_callback(form.extra.delete, model_object=instance)
         except IntegrityError as e:
             objects = getattr(e, 'restricted_objects', None)
             if objects is None:
@@ -1596,6 +1596,8 @@ def delete_object__post_handler(form, **_):
             )
             return None
 
+    form.invoke_callback(form.extra.on_delete)
+
     return create_or_edit_object_redirect(
         is_create=False,
         redirect_to=form.extra.redirect_to,
@@ -2147,6 +2149,8 @@ def get_errors(self):
         extra__on_save_all_but_related_fields=lambda **kwargs: None,  # pragma: no mutate
         extra__pre_save=lambda **kwargs: None,  # pragma: no mutate
         extra__on_save=lambda **kwargs: None,  # pragma: no mutate
+        extra__pre_delete=lambda **kwargs: None,  # pragma: no mutate
+        extra__delete=lambda model_object, **_: model_object.delete(),
         extra__on_delete=lambda **kwargs: None,  # pragma: no mutate
         extra__redirect=lambda redirect_to, **_: HttpResponseRedirect(redirect_to),
         extra__redirect_to=None,